Nackt-Radtour, Karlsruher FKK Rad-Classics and Karlsruher Nacktradeltour are references used to describe annual naked cycling tours in Germany, many of which happen around Karlsruhe. Organizers describe the event as recreational rather than political. Full and partial (especially topfree) nudity is encouraged, but not mandatory, on all rides. The rides are believed to be some of the first naked bike rides organized in the world.